Which component is used to encapsulate devices in resin?

Which component is used to encapsulate devices in resin?

• A. Conformal coating
• B. Potting compound
• C. Sealant
• D. Thermal paste

Answer: (B)

Encapsulating electronics in resin is about fully surrounding an assembly with a protective resin to seal out moisture, dust, and vibration while providing electrical insulation. A potting compound is the resin that’s poured or injected around the device and allowed to cure, forming a solid or gel-like mass that completely envelops the components. This makes the assembly rugged, tamper-resistant, and protected in harsh environments, which is why it’s the best fit for resin encapsulation. Conformal coating, by contrast, is a very thin protective film applied to the surface of a printed circuit board, not a full encapsulation. A sealant is used to close gaps or joints but doesn’t wrap the entire device in resin. Thermal paste is intended to improve thermal transfer between components and heatsinks, not to provide environmental or mechanical protection.

Encapsulating electronics in resin is about fully surrounding an assembly with a protective resin to seal out moisture, dust, and vibration while providing electrical insulation. A potting compound is the resin that’s poured or injected around the device and allowed to cure, forming a solid or gel-like mass that completely envelops the components. This makes the assembly rugged, tamper-resistant, and protected in harsh environments, which is why it’s the best fit for resin encapsulation.

Conformal coating, by contrast, is a very thin protective film applied to the surface of a printed circuit board, not a full encapsulation. A sealant is used to close gaps or joints but doesn’t wrap the entire device in resin. Thermal paste is intended to improve thermal transfer between components and heatsinks, not to provide environmental or mechanical protection.